Across
- 5. a yellowish gas
- 6. when a substance has dissolved into a liquid
- 7. a grey solid or purple vapour
- 10. what neutralises toxins produced by pathogens
- 12. attaches to and kill pathogen
- 14. artificial immunity
- 16. a substance made up of only one type of atom
- 17. hammered into thin sheet and can be bent
- 19. charged atom or molecule
Down
- 1. elements in group 7
- 2. vertical column
- 3. horizontal rows
- 4. single cell organism that has no nucleus
- 5. technique used to separate an insoluble substance from a solvent
- 8. a cell that helps defend against pathogens
- 9. arranged the elements in order of their atomic masses
- 11. help to relieve the symptoms of disease or kill infectious pathogens
- 13. the substance that has dissolved in a liquid to make a solution
- 15. a substance made when two more elements are chemically bonded
- 18. small parts of an element that can still be recognised as that element